Please help?? How many and what type of chromosomes would be expected in a karyotype of a human male? 1. 22 pairs of autosomal chromosomes and 2 Y chromosomes 2. 23 pairs of autosomal chromosomes and 2 Y chromosomes 3. 22 pairs of autosomal chromosomes, 1 X chromosome, and 1 Y chromosome 4. 23 pairs of autosomal chromosomes, 1 X chromosome, and 1 Y chromosome Which of the following pairs of genotypes result in the same phenotype? 1. IAIA and IAIB 2. IBIB and IBi 3. IBIB and IAIB 4. IBi and ii

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for the first one you need to remember the diploid number is 46. Out of them two are determining the sex either XX for woman or XY for men; For the second capital stands for a dominant allele.

I still can't really figure it out

so you have 44 autosomal chromosomes. that makes 22 pairs then a male is XY. For the second you need to find pairs for which the capital letter make a similar combinaison. the first one for example the left proposition will express IA when the right will express IAB. clearer like that?

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